Indexable structure of heavy boring head

Abstract

The utility model relates to the technical field of machining numerical control tools, in particular to an indexable structure of a heavy boring head, which comprises a main body and a blade seat, a blade is mounted on the blade seat, a seat body H and a seat body S are arranged at the top of the main body, and the height L1 of the seat body H is larger than the height L2 of the seat body S; the blade seat comprises a blade seat H and a blade seat S, and the height L3 of the blade seat H is larger than the height L4 of the blade seat S; the blade seat H is fixedly mounted on the seat body H, and the blade seat S is fixedly mounted on the seat body S; or the blade seat H is fixedly mounted on the seat body S, and the blade seat S is fixedly mounted on the seat body H. The heavy boring head has the advantages that two transposition modes can be obtained through pairwise matching of different base bodies and different blade bases, that is, the same heavy boring head can meet the use requirements of symmetrical boring and stepped boring, switching can be completed only by replacing the blade bases, the number of times of tool replacement is reduced, and the tool storage pressure of a tool magazine of a machine tool is reduced.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining tool technology, and in particular to an indexable structure for a rough boring head. Background Technology

[0002] In the field of hole machining in mechanical manufacturing, boring tools are very important and widely used CNC cutting tools. The main function of rough boring tools is to quickly remove excess metal during hole enlargement. With the continuous development of high-speed, high-efficiency cutting technology and cutting machine tools, higher requirements are placed on the machining efficiency and reliability of boring tools.

[0003] Existing double-edged roughing boring tools have radially adjustable inserts, allowing for adjustment of the cutting diameter. Furthermore, most of the two inserts employ a synchronous adjustment structure, resulting in symmetrical boring.

[0004] In applications where machining long cutting materials requires precise cutting control, stepped boring is necessary. In such cases, a special tool for stepped boring is required, which increases the number of tools needed and the number of tool changes, resulting in excessive occupancy of the machine tool magazine. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an indexable structure for a roughing boring head. By matching different bases with different insert holders in pairs, two indexing modes can be obtained. That is, the same roughing boring head can meet the needs of symmetrical boring and stepped boring. Switching can be completed simply by changing the insert holders, reducing the number of tool changes and reducing the tool storage pressure of the machine tool magazine.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An indexable structure for a roughing boring head includes a main body and a blade holder. A blade is mounted on the blade holder. The top of the main body has a base H and a base S, with the height L1 of base H being greater than the height L2 of base S. The blade holder includes a blade holder H and a blade holder S, with the height L3 of blade holder H being greater than the height L4 of blade holder S. The blade holder H is fixedly mounted on the base H, and the blade holder S is fixedly mounted on the base S; or: the blade holder H is fixedly mounted on the base S, and the blade holder S is fixedly mounted on the base H.

[0008] Furthermore, the seat H and seat S are centrally symmetrical about the axis of the main body.

[0009] Furthermore, both the base H and the base S have threaded holes on their top surfaces. The blade holder H has a fixing hole H that penetrates its upper and lower surfaces, and the blade holder S has a fixing hole S that penetrates its upper and lower surfaces. During installation, a fastening bolt is passed through the fixing hole and locked into the corresponding threaded hole.

[0010] Furthermore, the bottom surface of the blade holder H is provided with a positioning surface H, and the bottom surface of the blade holder S is provided with a positioning surface S. When locked, the positioning surface abuts against the top surface of the seat body.

[0011] Furthermore, the height difference between the base H and the base S is equal to the height difference between the blade base H and the blade base S, that is: L1-L2=L3-L4.

[0012] This utility model has the following advantages:

[0013] 1. The two machining methods can be quickly switched. Simply remove the clamping screws and interchange the positions of the two insert holders to switch between symmetrical and stepped boring methods, reducing the number of tool changes and lowering the tool storage pressure of the machine tool magazine. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a side view of the present invention.

[0016] Figure 3 This is a three-dimensional structural diagram of the main body of this utility model;

[0017] Figure 4 This is a side view of the main body of the present utility model.

[0018] Figure 5 This is a three-dimensional structural diagram of the blade holder H of this utility model;

[0019] Figure 6 This is a side view of the blade holder H of this utility model;

[0020] Figure 7 This is a side view of the blade holder S of this utility model.

[0021] Figure 8 This is a three-dimensional structural diagram of the first transposition mode of this utility model;

[0022] Figure 9 This is a three-dimensional structural diagram of the second transposition mode of this utility model;

[0023] In the figure: 1-Main body, 11-Seat H, 12-Seat S, 2-Blade holder, 21-Blade holder H, 211-Fixing hole H, 212-Positioning surface H, 22-Blade holder S, 221-Fixing hole H, 222-Positioning surface S, 3-Blade, 4-Fastening bolt. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0025] like Figures 1 to 7 As shown, a repositionable structure for a roughing boring head includes a main body 1 and a blade holder 2. The main body 1 is provided with a TMG21 modular interface. Blades 3 are mounted on the blade holder 2. Specifically, blade mounting slots are provided at the corners of the blade holder, and blades 4 are locked and fixed in the corresponding blade mounting slots by screws 5. The top of the main body 1 is provided with a base H11 and a base S12, and the height L1 of the base H11 is greater than the height L2 of the base S12. The blade holder 2 includes a blade holder H21 and a blade holder S22, and the height L3 of the blade holder H21 is greater than the height L4 of the blade holder S22. The blade holder H21 is fixedly mounted on the base H11, and the blade holder S22 is fixedly mounted on the base S12; or: the blade holder H21 is fixedly mounted on the base S12, and the blade holder S22 is fixedly mounted on the base H11. By pairing different mounting bodies with different insert holders, two indexing modes can be obtained. The same roughing head can meet the needs of symmetrical boring and stepped boring. Switching can be completed simply by swapping the insert holders, reducing the number of tool changes and lowering the tool storage pressure of the machine tool magazine.

[0026] Furthermore, the base H11 and base S12 are centrally symmetrical about the axis of the main body 1. The shape of base H11 is similar to that of base S12, the only difference being their height above the main body 1. The shape of blade holder H21 is similar to that of blade holder S22, the difference being the dimensions that determine the installation height.

[0027] Furthermore, such as Figure 3 As shown, both the top surfaces of the base H11 and the base S12 are provided with threaded holes, such as... Figure 5 and Figure 6 As shown, the blade holder H21 has a fixing hole H211 that penetrates its upper and lower surfaces, as... Figure 7 As shown, the blade holder S22 has a fixing hole S221 that penetrates its upper and lower surfaces. During installation, a fastening bolt 4 is passed through the fixing hole and locked into the corresponding threaded hole.

[0028] Furthermore, such as Figure 2 , Figure 6 and Figure 7As shown, the bottom surface of the blade holder H21 is provided with a positioning surface H212, and the bottom surface of the blade holder S22 is provided with a positioning surface S222. When locked, the positioning surfaces abut against the top surface of the base body. Positioning surfaces H212 and S222 are inclined positioning surfaces. Correspondingly, the top surfaces of the base body H11 and base body S12 are matched with the inclined positioning surfaces. As the locking force increases, the connection between the base body and the blade holder becomes more reliable, and the overall rigidity is greatly improved.

[0029] In this embodiment, the height difference between the seat H11 and the seat S12 is equal to the height difference between the blade seat H21 and the blade seat S22, that is: L1-L2=L3-L4.

[0030] Inversion mode 1 (step boring mode):

[0031] like Figure 8 As shown, the base H11 mates with the blade holder H21, and the base S12 mates with the blade holder S22. After locking, the height difference between the two blades 3 is ∆L = (L1 - L2) + (L3 - L4). In actual use, the height difference between the base H11 and the base S12, and the height difference between the blade holders H21 and S22 are both 0.2mm, that is: L1 - L2 = L3 - L4 = 0.2mm. Therefore, the height difference between the two blades 3 is ∆L = (L1 - L2) + (L3 - L4) = 0.4mm.

[0032] Inversion mode 2 (symmetric boring mode):

[0033] like Figure 9 As shown, the base H11 mates with the blade holder S22, and the base S12 mates with the blade holder H21. After locking, the height difference between the two blades 3 is ∆L = (L1-L2) - (L3-L4). In actual use, the height difference between the base H11 and the base S12, and the height difference between the blade holders H21 and S22 are both 0.2mm, that is: L1-L2 = L3-L4 = 0.2mm. Therefore, the height difference between the two blades 3 is ∆L = (L1-L2) - (L3-L4) = 0, meaning there is no height difference between the two blades 3.

[0034] Simply put, when using the "SS-HH" combination (indexing mode one), it is stepped boring. In this state, the cutting diameters of the two inserts are different (the radial position of the inserts can be adjusted); when using the "SH-SH" combination (indexing mode two), it is symmetrical boring. In this state, the cutting diameters of the two inserts are the same (the radial position of the inserts can be adjusted).

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A repositionable structure for a roughing boring head, comprising a main body (1) and a blade holder (2), wherein a blade (3) is mounted on the blade holder (2), characterized in that: The top of the main body (1) is provided with a seat H (11) and a seat S (12), the height L1 of the seat H (11) is greater than the height L2 of the seat S (12); the blade seat (2) includes a blade seat H (21) and a blade seat S (22), the height L3 of the blade seat H (21) is greater than the height L4 of the blade seat S (22); The blade holder H (21) is fixedly mounted on the base body H (11), and the blade holder S (22) is fixedly mounted on the base body S (12); Alternatively: the blade holder H (21) is fixedly mounted on the base S (12), and the blade holder S (22) is fixedly mounted on the base H (11).

2. The indexable structure of a roughing boring head according to claim 1, characterized in that: The seat H (11) and seat S (12) are centrally symmetrical about the axis of the main body (1).

3. The indexable structure of a roughing boring head according to claim 1, characterized in that: The top surfaces of the base H (11) and base S (12) are provided with threaded holes. The blade holder H (21) is provided with a fixing hole H (211) that penetrates its upper and lower surfaces. The blade holder S (22) is provided with a fixing hole S (221) that penetrates its upper and lower surfaces. When fixing and installing, the fastening bolt (4) is passed through the fixing hole and locked into the corresponding threaded hole.

4. The indexable structure of a roughing boring head according to claim 1, characterized in that: The bottom surface of the blade holder H (21) is provided with a positioning surface H (212), and the bottom surface of the blade holder S (22) is provided with a positioning surface S (222). When locked, the positioning surface abuts against the top surface of the seat body.

5. The indexable structure of a roughing boring head according to claim 1, characterized in that: The height difference between the seat H (11) and the seat S (12) is equal to the height difference between the blade seat H (21) and the blade seat S (22), that is: L1-L2=L3-L4.

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